Transient electromagnetic field emitted by a pulsed current travelling along finite, thin straight wires above a plane non-perfectly conducting earth

摘要

The transient electromagnetic field emitted by a pulsed current travelling along a configuration of thin, straight wires above a plane non-perfectly conducting earth is investigated. This problem is of great interest in the field of electromagnetic interference problems (EMI). These problems occur in the vicinity of high voltage distribution lines, due to the switching phenomena, large current impulses can cause the coupling of large transient voltages to control and signal circuits. By using proper transformation variables in the Laplace-Fourier transform domain we can solve with the aid of the Cagniard-de Hoop method the transient electromagnetic field problem. The method used to increase the numerical efficiency in the case of a lossy half-space is outlined.